Comment 2 for bug 1543800

According to the spec:

http://specs.openstack.org/openstack/nova-specs/specs/mitaka/approved/libvirt-hardware-policy-from-libosinfo.html#other-deployer-impact

libosinfo should be installed, but if it's not, things should still continue to work as they did before. I'm not sure if that's happening or not because I'm not sure if what we're using in the gate testing would rely on this code.